ethyl 2,3,4-tri-O-benzoyl-6-O-(2,3,4,6-tetra-O-benzoyl-β-D-glucopyranosyl)-1-thio-β-D-galactopyranoside | 636997-65-4

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: ethyl 2,3,4-tri-O-benzoyl-6-O-(2,3,4,6-tetra-O-benzoyl-β-D-glucopyranosyl)-1-thio-β-D-galactopyranoside
• 英文别名: Bz(-2)[Bz(-3)][Bz(-4)][Bz(-6)]Glc(b1-6)[Bz(-2)][Bz(-3)][Bz(-4)]Gal(b)-SEt；[(2R,3R,4S,5R,6R)-3,4,5-tribenzoyloxy-6-[[(2R,3S,4S,5R,6S)-3,4,5-tribenzoyloxy-6-ethylsulfanyloxan-2-yl]methoxy]oxan-2-yl]methyl benzoate
• CAS: 636997-65-4
• 化学式: C₆₃H₅₄O₁₇S
• 分子量: 1115.18
• InChiKey: ICOPVIPFFPCYJO-TZMGWPCRSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  12
• 重原子数：
  81
• 可旋转键数：
  27
• 环数：
  9.0
• sp3杂化的碳原子比例：
  0.22
• 拓扑面积：
  237
• 氢给体数：
  0
• 氢受体数：
  18

反应信息

• 作为反应物：
  描述：

  ethyl 2,3,4-tri-O-benzoyl-6-O-(2,3,4,6-tetra-O-benzoyl-β-D-glucopyranosyl)-1-thio-β-D-galactopyranoside 、 4,5-dihydrothiazol-2-yl 2,3,4-tri-O-benzoyl-1-thio-β-D-glucopyranoside 在 N-碘代丁二酰亚胺 、 三氟甲磺酸 作用下， 以 1,2-二氯乙烷 为溶剂， 生成 [(2R,3R,4S,5R,6R)-3,4,5-tribenzoyloxy-6-[[(2R,3S,4S,5R,6R)-3,4,5-tribenzoyloxy-6-[[(2R,3R,4S,5R,6S)-3,4,5-tribenzoyloxy-6-(4,5-dihydro-1,3-thiazol-2-ylsulfanyl)oxan-2-yl]methoxy]oxan-2-yl]methoxy]oxan-2-yl]methyl benzoate
  参考文献：
  名称：

  Glycosyl thioimidates in a highly convergent one-pot strategy for oligosaccharide synthesis

  摘要：

  Application of two classes of thioimidoyl derivatives, S-benzoxazolyl (SBox) and S-thiazolyl (STaz) glycosides to selective activation over thioglycosides is described. These results allowed us to synthesize a tetrasaccharide derivative using a leaving group differentiated one-pot strategy in 73% yield over three sequential glycosylation steps. (C) 2004 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tetasy.2004.11.029
• 作为产物：
  描述：

  benzoxazol-2-yl 2,3,4,6-tetra-O-acetyl-1-thio-β-D-glucopyranoside 在 吡啶 、 甲醇 、 氨 、 silver trifluoromethanesulfonate 作用下， 以 1,2-二氯乙烷 为溶剂， 反应 16.0h， 生成 ethyl 2,3,4-tri-O-benzoyl-6-O-(2,3,4,6-tetra-O-benzoyl-β-D-glucopyranosyl)-1-thio-β-D-galactopyranoside
  参考文献：
  名称：

  S-苯并恶唑基在寡糖合成中作为稳定的保护基和有效的端基离开基团

  摘要：

  作为开发用于立体选择性糖基化和收敛性寡糖合成的新多功能构件的计划的一部分，我们证明了S-苯并恶唑基（SBox）糖苷对碳水化合物化学中采用的主要保护基操作稳定。另一方面，它们可以在相对温和的反应条件下被糖基化以提供1，2-反式或1，2-顺式连接的二糖。还证明了SBox部分的选择性和化学选择性活化是可行的，这通过合成许多寡糖序列得到证明。

  DOI：

  10.1021/jo071191s

文献信息

• <i>S</i>-Benzoxazolyl (SBox) Glycosides in Oligosaccharide Synthesis: Novel Glycosylation Approach to the Synthesis of β-<scp>d</scp>-Glucosides, β-<scp>d</scp>-Galactosides, and α-<scp>d</scp>-Mannosides
  作者：Alexei Demchenko、Medha Kamat、Cristina De Meo

  DOI：10.1055/s-2003-40345

  日期：——

  Per-acetylated and per-benzoylated S-benzoxazolyl (SBox) glycosides have been synthesized and applied to highly efficient 1,2-trans glycosylation. Complete stereoselectivities and remarkably high yields were achieved for the synthesis of β-d-glucosides, β-d-galactosides, and α-d-mannosides. It was also de­monstrated that benzoylated ‘disarmed’ SBox glycosides could be selectively activated in the presence of both armed and disarmed ethyl thioglycosides. Convergent synthesis of the tetra­saccharide β-d-Glc-(1-6)-β-d-Gal-(1-6)-β-d-GlcNAc-(1-6)-α-d-GlcOMe was achieved in three sequential selective glycosylation steps.

  合乙酰化和合苯甲酰化的S-苯并噁唑基(SBox)糖苷已被合成并应用于高效的1,2-反式糖苷化。对β-d-葡萄糖苷、β-d-半乳糖苷和α-d-甘露糖苷的合成实现了完全的立体选择性和显著高的产率。还证明了苯甲酰化的“去活化”SBox糖苷可以在有活化和去活化的乙硫糖苷同时存在的情况下被选择性激活。成功实现了四糖β-d-Glc-(1-6)-β-d-Gal-(1-6)-β-d-GlcNAc-(1-6)-α-d-GlcOMe的汇聚合成，通过三步连续的选择性糖苷化反应完成。
• S-Thiazolinyl (STaz) Glycosides as Versatile Building Blocks for Convergent Selective, Chemoselective, and Orthogonal Oligosaccharide Synthesis
  作者：Papapida Pornsuriyasak、Alexei V. Demchenko

  DOI：10.1002/chem.200600262

  日期：2006.8.25

  In the aim of developing new procedures for efficient oligosaccharide assembly, a range of S-thiazolinyl (STaz) glycosides have been synthesized. These novel derivatives were evaluated against a variety of reaction conditions and were shown to be capable of being chemoselectively activated in the armed-disarmed fashion. Moreover, the S-thiazolinyl moiety exhibited a remarkable propensity for selective

  为了开发有效寡糖组装的新方法，已合成了一系列S-噻唑啉基（STaz）糖苷。这些新颖的衍生物针对各种反应条件进行了评估，并显示出能够以武装-解除武装的方式进行化学选择性活化。此外，与其他常见的离去基团相比，S-噻唑啉基部分显示出显着的选择性活化倾向。相反，可以在STaz部分上选择性激活各种离去基团，从而允许STaz / S-乙基和STaz / S-苯基正交方法。为了证明新型STaz衍生物的多功能性，已经以收敛的选择性，正交和化学选择性方式合成了许多寡糖靶标。
• HPLC‐Based Automated Synthesis of Glycans in Solution
  作者：Samira Escopy、Yashapal Singh、Keith J. Stine、Alexei V. Demchenko

  DOI：10.1002/chem.202201180

  日期：2022.7.11

  A new experimental set-up for a HPLC-A in solution system includes the following modifications: 4-way split valve, in-line molecular sieve cartridge and a fraction collector, which enabled fully automated batch synthesis of multiple oligosaccharides with the single press of a button.

  HPLC-A 溶液系统的新实验装置包括以下修改：4 通分流阀、在线分子筛滤芯和馏分收集器，只需按一次即可全自动批量合成多种寡糖。一个按钮。
• On Orthogonal and Selective Activation of Glycosyl Thioimidates and Thioglycosides: Application to Oligosaccharide Assembly
  作者：Sophon Kaeothip、Alexei V. Demchenko

  DOI：10.1021/jo201117s

  日期：2011.9.16

  Discrimination among S-thiazolinyl (STaz), S-benzoxazolyl (SBox), and S-ethyl anomeric leaving groups was achieved by fine-tuning activation conditions. Preferential glycosidation of a certain leaving group is determined neither by the strength of the activating reagent nor by the stability of the leaving group itself; instead, the type of activation plays the key role. The activation conditions established herein were applied to a sequential five-step synthesis of a hexasaccharide using six monosaccharide building blocks equipped with six different leaving groups.